Skip to content

Instantly share code, notes, and snippets.

View zeeshanlakhani's full-sized avatar

Zeeshan Lakhani zeeshanlakhani

493 followers · 576 following
View GitHub Profile
@zeeshanlakhani
zeeshanlakhani / latency.txt
Created October 31, 2015 21:40 — forked from jboner/latency.txt
Latency Numbers Every Programmer Should Know
Latency Comparison Numbers
--------------------------
L1 cache reference 0.5 ns
Branch mispredict 5 ns
L2 cache reference 7 ns 14x L1 cache
Mutex lock/unlock 25 ns
Main memory reference 100 ns 20x L2 cache, 200x L1 cache
Compress 1K bytes with Zippy 3,000 ns
Send 1K bytes over 1 Gbps network 10,000 ns 0.01 ms
Read 4K randomly from SSD* 150,000 ns 0.15 ms
@zeeshanlakhani
zeeshanlakhani / presentation.md
Created December 3, 2015 21:21 — forked from slfritchie/presentation.md
Erlang tracing, for the Riak source code reading series, 2014-03-18, Tokyo, Japan

Erlang Tracing: more than you wanted to know

Rough Outline

  • What can be traced?
  • How can trace events be specified?
  • "match specifications": twisty passages, all alike
  • WTF, can I just use DTrace and drink my coffee/beer/whisky in peace?
  • Trace delivery mechanisms: pick one of two